# Circle

Creates a fixtured Circle structure.

## Circle Inputs

Parameter | Description
Image | This argument must reference a spreadsheet cell that contains a valid Image data structure. By default, the cell referenced is $A$0, which contains the image data structure returned by AcquireImage.
Fixture | Specifies the image coordinate system in which the circle is defined.
X | The x-offset of the fixture.
Y | The y-offset of the fixture.
Theta | Offset from fixture origin.
Circle | Specifies the size and position of the circle, in fixture coordinates.
X | The x-offset of the circle.
Y | The y-offset of the circle.
Radius | The radius of the circle.
Show | Selects the type of graphics to overlay on the image.
0 = hide all | The circle structure graphic will not be displayed unless the cell containing the circle function is highlighted in the spreadsheet.
2 = input graphics only | The circle structure graphic will be displayed at all times.

Note: The Fixture and Circle parameters must be defined within the bounds of the image; otherwise, the function will return #ERR.

## Circle Outputs

Returns | A Circle data structure, or #ERR if any of the input parameters are invalid.
Results | When Circle is initially inserted into a cell, a result table is created in the spreadsheet with the following Structures Vision Data Access Functions
Label | Function | Description
X | GetX(Circle) | The x-coordinate.
Y | GetY(Circle) | The y-coordinate.
Radius | GetRadius(Circle) | The radius of the circle.